I dont know if this has been posted, but this video is for sale here:

http://www.bestmotoringvideo.com/buy_06.html

It has Japanese race drivers racing a Z against an M3, Porche Boxster, and S2000. There's also a pretty lengthy preview at that web address. In the preview, there is also a nice close-up shot of a driver doing the "double clutching" (or whatever u guys called it on another thread where you have your toe on the brake and your heel on the gas) for those who didnt know what it was and/or how to do it.